your first step should be to brain storm ideas for your topic you can make a web or bullet ideas
next you should research or find key things you would like to quote from the book
start your rough draft and try to keep it to the word count you are required it should began with either (a quote, a question, or some sort of catching device)
after you finish go back through and google ways to change your words around for example for saying "he threw a punch" you could say "he propelled his fist cutting through the air he...."